Remote control of radio apparatus



June 8:, WEBER REMOTE CONTROL 01" RADIO APPARATUS Filed Oct; 25, 1935 OUTPUT AMPLIFIER OUTPUT AMPIJHER H OSCILLATOR 05$ 9 LLATOR TRQNSMHTER OUTPUT 4 5 AMPu-FIER RECEIVER INPUT REGEWER INPUT AND RELAY AND RESONATOR RESONATOR RECEIVER INVENTOR. RUDQLF WEBER BY y g/u' 1/ 'ATTORNEY.

Patented June 8, 1937 uurreo srA'rss rA'rsNr OFFICE 2,083,105 REMOTE CONTROL OF RADIO APPARATUS time of y Application Qctolaor 25, 1935, Serial No. 48,735 In Germany llctobcr l, 1934 This inventlon relates to a. remote control sys tem in which eachdefinite displacement of the control knob at the piece of control'couses o corresponding displacement of the remotely controlled organ.

The present lnventlon relates to o. remote con trol whereby each. displacement oi the control knob at the place of control (tor instance s. rototlonsl dlsplocementl causes at corresponding displacement of the respective organ at the remotely controlled place (tor instance lllrcwise a rotational displacement) The remote control arrangement according to this invention is as follows:

At the transmitter side there is coordinoted with each position of the control lrnoh of the place or control hi on uneoulv csl manner o. definlim value of at variable frequency f and there ls coordinated with each of the two directions of movement ol the control knob one of two constmt frequencies h or is respectively. Alt the re celver side the respectively received fixed frequency h or is releases a movement oil the only log motor in the one or in the other direction, respectively, and which displaces the organ to be remotely controlled in the desired direction for such length of time, thereby also verylng the tunins of an oscillatory circuit ted by the receiver (resonator) of the variable frequency :f for such length of time until the said osclllotory circuit is in resonance with the frequency f by which it is excited, thereby causing the shutting oil of the driving; motor whereby the remotely con trolled organ comes to a. stand still.

An example of an embodiment of the ldea of the invention ls schematically represented in the drawing in which Fig.1 is a. diagram of estrousmltter arrangement, and Fig. 2 is a diagram of o receiver arrangement.

The transmitter, see Figure 1, contains an oscillator l for producing a constant frequency !1, a further oscillator 2 for another constant irequency In and an oscillator 3 for avoidable frequency f. The frequency energies respectively derived from their outputs l, 2', and 3' are prelerobly amplified by a suitable known amplifier errangemeut not shown in detail herein, and are employed for modulating a. transmitter (likewise not shown herein). In displacing a. control orgen, for instance, by turning a, hand wheel 5 the frequency! will be increased or decreased in accordance with the direction in which the control organ is moved. Furthermore, for each position of the control range and in accordance with dimotion of tu ning of the hand wheel the contact N71. I'm-239) A or B of the switch Q will be closed so that, for instance, in turning the wheel towards the lelt, the oscillator l will be connected, while by turning the wheel in the opposite direction, the osclllater 2 will be connected (while oscillator l is simultaneously disconnected).

The receiver arrangement, see Figure 2, contaln's resonators 8 and l for the fixed frequencies f1 and f2 respectively, and the resonator for the variable frequency f.. The resonators ore preferably excited at. their inputs 6', l and 8' by the usual receiver apparatus (not shown in detell on the drawing) and they in turn excite relays of suitable and @own constructions which may be direct current ampliiylng relays or resonance relays. These relays have not been shown in connection with the resonators 6 end i and are assumed as being included lo the apparatus 8 and l. The resonator ll is so coupled with e. displacement motor 9 that in} accordance with the direo tion of rotation of the motor, an increase or decrease of the natural resonance takes place. Both of the resonators 6 and l, respectively, switch in the motor current through the respectlve lrequency h or is and in such mermer that the one resonator causes the current to pass through the motor in the one direction, while the other resonator passes the current in the other direction thereby causing the motor to rotate in the corresponding direction of rotation. This control of the motor is indicated in the drawing in a purely schemetical manner by the signs and =F atthe places H and l2,respectlve1y. An interrupter relay Ill is furthermore placed in the motor current circuit and which is released by the resonator 8.

The functioning oi the arrangement is as follows:

At the transmitter the turning of the hand wheel 5 towards the left, for instance, closes the contact A and therefore sets the oscillator I in operation. Furthermore, the variable frequency 1 will be decreased at a. certain amount corresponding with the turning of the hand wheel. At the receiver, the resonator 8 responds to the irequency f1 and releases a. current which causes the displacement motor 9 to rotate in a. certain direction. At the some time, the resonance position of the resonator 8 will thereby be dis placed and finally attains the frequency f radiated by the transmitter. The interrupter relay I0 is thereby put in operation and interrupts the wire lines.

Having thus described my invention, what I claim is:

1. Remote control apparatus for producing a definite displacement to a remotely located controlled orgarrl, from an organ located at the place of control comprising a transmitter having control means which is coordinated to each position of the control means at the place of control with an unequivocal and definite value of a variable frequency, said control organ arranged to have two directions of movement each of which corresponds to a first and second constant frequency, a first and second oscillator for producing said frequencies, a receiver having means whereby said first and second constant frequency releases a movement of a displacement motor in the one or other direction, said motor displacing the organ to be remotely controlled in the desired direction during such length of time, and at the same time, thereby varying the tuning of an oscillatory circuit excited by the receiver of the variable frequency during such length of time until the said oscillatory circuit is in resonance with the variable frequency by which it is excited thereby causing energimtionof a relay for shutting off of the displacement motor and bringing the remotely controlled organ to a standstill.

2. Remote control apparatus for producing a definite displacement to a remotely located controlled organ from an organ located at the place of control comprising a transmitter having a control device with manual means for increasing or decreasing the value of a variable frequency of an oscillator, a first and second fixed oscillator connected to said first mentioned control organ, means associated with said first mentioned control organ whereby said first fixed oscillator is made operative when the value of said variable oscillator is decreased and said second oscillator is made operative when the value of said variable oscillator is increased, a receiver having means responsive to said first and second fixed oscillators, a motor coupled to said means responsive to said first and second fixed oscillators, the direction of said motor being controlled by current received by said first and second frequencies, and means for connecting said remotely controlled organ with said motor whereby current from said variable frequency energizes a relay to cause said motor to become inoperative.

3. Remote control apparatus for producing a definite displacement to a remotely located controlled organ from an organ located at the place of control comprising a transmitter having a control device with manual means for increasing or decreasing the value of a variablefrequency of an oscillator, electrical contacts associated with said manual device, a first and second fixed oscillator connected to said first mentioned control organ, means associated with said first mentioned controlled organ whereby said first fixed oscillator is made operative when the value of said variable oscillator is decreased, and said second oscillator ismade operative when the value of said variable oscillator is increased, a receiver having means responsive to said first and second fixed oscillators, a motor coupled to said means responsive to said first and second fixed oscillators, the direction' of current controlled by current received by said first and second frequencies, and means for connecting said -remotely controlled organ with said motor whereby current from said variable frequency energizes a relay to cause said motor to become inoperative.

4. Remote control apparatus for producing a dclnite displacement to o. remotely located controlled organ ifrom an organ located at the place oi control comprising a transmitter having a control device with manual means for increasing or decreasing the value of a variable frequency of an oscillator, a first and second fixed oscillator connected to said first mentioned controlled organ, means associated with said first mentioned controlled organ whereby said first fixed oscillator is made operative when the value of said variable oscillator is decreased, and said second oscillator is made operative when the value of said variable oscillator is increased, a receiver and a resonant relay having means responsive to said first and second fixed oscillators, a motor coupled to said means responsive to said first and second fixed oscillators, the direction of said motor being controlled by current received by said first and second frequencies, and means for connecting said remotely controlled organ with said motor whereby current from said variable frequency energizes said resonant relay to cause said motor to become inoperative.

5. Remote control apparatus for producing a definite displacement to a remotely located controlled organ from an organ located at the place of control comprising a transmitter having a control device with manual means for increasing or decreasing the value of a variable frequency of an oscillator, a first and second fixed oscillator connected to said first mentioned controlled organ, means associated with said first mentioned controlled organ whereby said first fixed oscillator is made operative when the value of said variable oscillator is decreased and said second oscillator is made operative when the value of said variable oscillator is increased, a, receiver and a resonant relay having means responsive to said first and second fixed oscillators, a motor coupled to said means responsive to said first and second fixed oscillators, the direction of which is controlled by current received by said first and second frequency, and a relay having control means for connecting said remotely controlled organ with said motor whereby current from said variable frequency energizes said resonant relay to cause said motor to become inoperative.

RUDOLF WEBER. 

